Atsushi Hayashi
ORCID: 0000-0003-4060-2383
· 14 papers in corpus
observational
2016
AIM: To investigate which risk factors contribute to a lower oocyte retrieval ratio in women who are receiving controlled ovarian hyperstimulation. METHODS: The authors retrospectively analyzed 329 in vitro fertilization (IVF) cycles under…
lab-animal
2015
The pathogenesis of endometriosis, a chronic painful gynecological disease characterized by the presence of endometrial tissue located outside of the uterus and often adhering to the peritoneum, is known to be estrogen dependent. However, t…
2015
Representative examples of sequential immunohistochemical sections stained with hematoxylin and eosin (b and e), anti-BimEL Abs (a, d, and g) and anti-FSH receptor Ab (c and f). The granulosa cells of each follicle were scored “negative” if…
observational
2015
PURPOSE: To investigate the effect of moderate to severe endometriosis on mRNA expression of growth differentiation factor-9 (GDF-9) in the granulosa cells of mature follicles. METHODS: Follicular fluid (FF) was obtained from 13 patients w…
other
2014
Although endometriosis is suspected to be a cause of premature ovarian insufficiency (POI), the mechanism(s) underlying this process have not been elucidated. Recently, androgens were shown to promote oocyte maturation and to play a role in…
observational
2014
PURPOSE: We performed TaqMan genotyping assays of anti-Mullerian hormone (AMH) and anti-Mullerian hormone receptor type II (AMHRII) single nucleotide polymorphisms (SNPs) in order to investigate how their frequency and distribution affect i…
lab-animal
2014
Dienogest, a synthetic progestin, has been shown to be effective against endometriosis, although it is still unclear as to how it affects the ectopic endometrial cells. Decorin has been shown to be a powerful endogenous tumor repressor acti…
observational
2013
PURPOSE: Examination of the mitochondrial mRNA expression in granulosa cells from an unspecified population of infertile patients to evaluate whether recombinant follicle stimulating hormone (recFSH) is more effective in producing higher qu…
other
2013
INTRODUCTION: GPR30 is a seven-transmembrane G protein-coupled estrogen receptor that regulates endometrial cellular responses to estrogen. GPR30 is often highly expressed in cancer cells from aggressive tumors. The aim of this study was to…
other
2012
BACKGROUND: The resistance of endometriotic tissue to progesterone can be explained by alterations in the distribution of progesterone receptor (PR) and estrogen receptor (ER) isoforms. The aims of this study were to examine the expressions…
2012
Background Endometriosis is one of the most common gynecological diseases associated with infertility. Endometriosis may affect the androgen receptor (AR) mRNA expression in human granulosa cells and the methylation of the promoter region o…
2012
Introduction: In an attempt to reduce pain and improve cosmetic outcome in laparoscopic surgery, there has been a recent drive to reduce port sizes (mini-laparoscopic surgery: MLS) or port number (single-site laparoscopic surgery). We evalu…
2012
observational
2011
OBJECTIVE: To evaluate how endometriosis affects the expression of estrogen and progesterone receptors mRNA in granulosa cells. DESIGN: Prospective study. SETTING: IVF-ET program at Osaka Medical College. PATIENT(S): Eighteen patients wi…